A little lesson in Scott part numbers: The first section of the number is the motor model number where the part was first used. The second section (after the dash) identifies the particular part. So, taking the number I gave you for the upper seal, 497 is the model of the motor where it was first used (model 497). It so happens that is a 1949 5hp. 1910 says it is an upper crankshaft seal.
Summing up, the numbers I gave you should be good for your 1949 5hp.
